You wake up to a support ticket: "I didn't make this purchase." Then another. Then five more. By the time you start investigating, the attacker has already changed the email, drained the balance, and disappeared. Account Takeover is fast, quiet, and increasingly automated. I've spent a lot of time dealing with these cases, and the pattern is usually the same: the warning signs were there, but nobody was paying attention to them. Here are the signals that matter most, along with practical ways to catch them. 1. Login patterns that don't make sense Most users are predictable. They log in from the same city, the same devices, and usually around the same time each day. So when an account suddenly shows up from another continent at 3 AM, it's probably not because the user is traveling. What to look for in your logs: This check isn't perfect. VPNs, mobile networks, and corporate proxies can all create false positives.…